21 December 2016
⇐20161220 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20161222⇒

NOAA
2 Active Regions
12620
12619

Flare Forecast
Flare Prediction System
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W11S18
(171",-269") 		E32-W42
(74) 		9.0 1.5 3.1e33
2 W05N50
(57",769") 		E66-W55
(121) 		7.8 0.5 3.0e33
3 W53N28
(684",480") 		W44-W63
(19) 		0.4 0.4 2.1e32
4 W22N14
(348",258") 		W18-W24
(6) 		0.3 3.3 2.7e32
5 E15S77
(-57",-942") 		E30-W13
(43) 		0.2 -1.0 -1.1e33
6 W38N47
(406",730") 		W34-W41
(7) 		0.0 -1.2 -6.6e31
7 W25N28
(371",483") 		W24-W27
(3) 		0.0 -0.9 -1.5e31

Note: Solar Monitor's coronal hole segmentations are performed by CHIMERA, a copy of which is available at: github.com/TCDSolar/CHIMERA.

The operations of the CHIMERA algorithm is described in a peer reviewed paper: arxiv.org/abs/1711.11476.

An extensive copy of coronal hole properties are available at: solarmonitor.org/data.

The latest positions of the coronal holes are given in heliocentric co-ordinates, and the region positions are valid on 21-Dec-2016 20:30 UT .